DE7275C - Use of a solution of silk in acetic acid for the purpose of covering vegetable fibers with the substance of silk - Google Patents

Description

1879.

Class 29.

PAUL MAGNIER and LOUIS FREDERIC DOERFLINGER in PARIS.

Use of a solution of silk in acetic acid for the purpose of covering vegetable fibers with the substance of silk.

Patented in the German Empire on February 13, 1879.

The procedure consists in particular in the combined use of acetic acid and heat and pressure, with the important condition that the quantities of weight used are the same Acetic acid, how heat and pressure can be varied. .

The following relationships have proven themselves in practice:

1 kg of acetic acid on 1 kg of silk;
the former is dissolved under 10 to 12 atmospheres pressure in a closed vessel, in which the heat of the steam under this pressure causes the silk to dissolve in the acetic acid.

If to dissolve 1 kg of silk a larger quantity, e.g. B. 2, 3, 4 or more kg Acetic acid is used, the heat and pressure of the steam dissolve up to reduce about 6 atmospheres.

Once the silk has dissolved, the solution can be z. B. use for smoothing textile threads, for finishing the fabric in such a way that it can accommodate more brilliant ones Colors become receptive, as firnifs or varnish for very different substances, as wood, Rubber, leather, gutta-percha, resinous bodies and all kinds of metals. But inventors lay special emphasis on the application of their silk solution to all kinds of vegetable matter Fibers in the manner described below.

In order not to speak of cotton, which has natural cellulose, hemp, jute, Alfa, Chinese grass, flax and so on are cited and inventors describe the application of theirs Solution on the latter substance as follows.

Flax, which has previously been bleached in a known manner, is placed in a bath of potassium hydrate or caustic soda with a density of 1.03 and the fabric remains in this for about 2 hours alkaline solution, which is brought to a Terftperatur of about 100 ° C.

The purpose of this treatment is to expel the foreign constituents from the cellulose and mainly the resinous substance surrounding the fiber.

This is followed by rinsing in pure water several times.

Then the flax is turned into a solution. Potash soap immersed in the boiling temperature, where he took half an hour. remain.

The flax is then washed in pure water and rinsed, then dried, in what state it represents cellulose, which can be treated like cotton, how will be described below.

It is sufficient to immerse the cellulose in a mixture of nitric acid and for 4 or 5 minutes Sulfuric acid, which turns the cellulose into pyroxylin, which in pure water is washed until the wash water no longer contains any trace of acid.

The doubly nitrous cellulose thus obtained is then in the lowest possible Temperature dried and then deoxidized without destroying the nitrogenous matter, what happens in the following way. The doubly nitrous cellulose is hermetically sealed in a closed container in which a vacuum is created so that a pressure is created that is no more than 10 mm on the mercury column of the manometer

After this treatment, the cellulose is immersed in a bath, which has a certain Quantum of doubly sulphurous soda, or a quantity of any other Contains substance which develops sulphurous acid when treated with an acid will.

Inventors commonly use phosphoric acid to cause the evolution of sulphurous acid. Thus, in order to reduce or deoxidize the nitro-cellulose, the action of the sulphurous acid in statu nascendi must be brought about on the nitro-cellulose, which the latter was previously placed under vacuum in order to be exposed to the action of a suitable desiccation.

The pulp prepared in this way is then put into an autoclave, which is so constructed that the fibers are held in a fixed position, each and every one of them by apart from the other, without which arrangement the silk does not extend over its entire circumference of the thread would settle. This autoclave is filled with a dissolution of silk which is 1.28

shows on the leakage meter and has been prepared as described above; the pot is closed, steam admitted into the double bottom or in a spiral tube, until the liquid has adopted a temperature of about 190 ^0th

The fabric remains in the silk solution for at least 14 hours and during this time a mighty stream of dynamic electricity is admitted until an adequate one It is established by the test that there is no longer any silk in the dissolution; in this way a deposit of silk on the vegetable fibers is obtained by passing through the dynamic electric current the silk settles or precipitates on the fibers.

The fabric is then taken out and dried in a known manner.

The fibrous matter, which is the double action of sulphurous acid and electricity have been exposed in an autoclave filled with silk solution are now done, the color with the help of one of the well-known aniline products such as amidines, mauveins, methylaniline, Fuchsin, Ethyl-Sasaniline, Chrysanilinu. s. w. to include.

Claims (2)

Patent Claims: i. The use of the silk solution described above for glazing any textile fibers to give the fabrics a finish that is receptive to absorbing the most brilliant colors furthermore as firnifs on the most varied of substances such as wood, rubber, leather, To serve gutta-percha, resinous substances, metals of all kinds etc. 2. The application of the imaginary silk dissolution to textile substances, which previously are brought into the state of pyroxyline and then deoxidized, without the nitrogen to destroy which application in the combined use successive Operations exist, the purpose of which is to remove the said textile substances from the action of sulphurous acid, as well as one to expose powerful dynamo-electric current, the latter during the textile fabrics immersed himself in a bath of dissolved silk in a closed vessel strong pressure and heat, as described. ■ The inventors reserve the right to either leave the substances in this state or in which the most brilliant animal fibers, such as B. the silk fibers, or then to dye them in some known way. JlJS.